    <nav class="navbar">
        <button class="btn btn-default navbar-btn fa fa-bars"></button>
        <ul class="nav navbar-nav navbar-right">
            <li><a href="/admin/profile"><i class="fa fa-user"></i>个人中心</a></li>
            <li><a href="/admin/login"><i class="fa fa-sign-out"></i>退出</a></li>
        </ul>
    </nav>